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/**
* (The MIT License)
*
* Copyright (c) 2008 - 2011:
*
* * {Aaron Patterson}[http://tenderlovemaking.com]
* * {Mike Dalessio}[http://mike.daless.io]
* * {Charles Nutter}[http://blog.headius.com]
* * {Sergio Arbeo}[http://www.serabe.com]
* * {Patrick Mahoney}[http://polycrystal.org]
* * {Yoko Harada}[http://yokolet.blogspot.com]
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* 'Software'), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
package nokogiri;
import static nokogiri.internals.NokogiriHelpers.getLocalNameForNamespace;
import static nokogiri.internals.NokogiriHelpers.getNokogiriClass;
import static nokogiri.internals.NokogiriHelpers.getPrefix;
import static nokogiri.internals.NokogiriHelpers.isNamespace;
import static nokogiri.internals.NokogiriHelpers.rubyStringToString;
import java.util.HashMap;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.jruby.Ruby;
import org.jruby.RubyArray;
import org.jruby.RubyClass;
import org.jruby.RubyString;
import org.jruby.anno.JRubyClass;
import org.jruby.anno.JRubyMethod;
import org.jruby.runtime.Helpers;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;
import org.jruby.util.ByteList;
import org.w3c.dom.Attr;
import org.w3c.dom.NamedNodeMap;
/**
* Class for Nokogiri::XML::DocumentFragment
*
* @author sergio
* @author Yoko Harada <yokolet@gmail.com>
*/
@JRubyClass(name="Nokogiri::XML::DocumentFragment", parent="Nokogiri::XML::Node")
public class XmlDocumentFragment extends XmlNode {
private XmlElement fragmentContext;
public XmlDocumentFragment(Ruby ruby) {
this(ruby, getNokogiriClass(ruby, "Nokogiri::XML::DocumentFragment"));
}
public XmlDocumentFragment(Ruby ruby, RubyClass klazz) {
super(ruby, klazz);
}
@JRubyMethod(name="new", meta = true, required=1, optional=2)
public static IRubyObject rbNew(ThreadContext context, IRubyObject cls, IRubyObject[] args) {
if (args.length < 1) {
throw context.runtime.newArgumentError(args.length, 1);
}
if (!(args[0] instanceof XmlDocument)){
throw context.runtime.newArgumentError("first parameter must be a Nokogiri::XML::Document instance");
}
XmlDocument doc = (XmlDocument) args[0];
// make wellformed fragment, ignore invalid namespace, or add appropriate namespace to parse
if (args.length > 1 && args[1] instanceof RubyString) {
final RubyString arg1 = (RubyString) args[1];
if (XmlDocumentFragment.isTag(arg1)) {
args[1] = RubyString.newString(context.runtime, addNamespaceDeclIfNeeded(doc, rubyStringToString(arg1)));
}
}
XmlDocumentFragment fragment = (XmlDocumentFragment) NokogiriService.XML_DOCUMENT_FRAGMENT_ALLOCATOR.allocate(context.runtime, (RubyClass)cls);
fragment.setDocument(context, doc);
fragment.setNode(context.runtime, doc.getDocument().createDocumentFragment());
//TODO: Get namespace definitions from doc.
if (args.length == 3 && args[2] != null && args[2] instanceof XmlElement) {
fragment.fragmentContext = (XmlElement)args[2];
}
Helpers.invoke(context, fragment, "initialize", args);
return fragment;
}
private static final ByteList TAG_BEG = ByteList.create("<");
private static final ByteList TAG_END = ByteList.create(">");
private static boolean isTag(final RubyString str) {
return str.getByteList().startsWith(TAG_BEG) && str.getByteList().endsWith(TAG_END);
}
private static boolean isNamespaceDefined(String qName, NamedNodeMap nodeMap) {
if (isNamespace(qName.intern())) return true;
for (int i=0; i < nodeMap.getLength(); i++) {
Attr attr = (Attr)nodeMap.item(i);
if (isNamespace(attr.getNodeName())) {
String localPart = getLocalNameForNamespace(attr.getNodeName(), null);
if (getPrefix(qName).equals(localPart)) {
return true;
}
}
}
return false;
}
private static final Pattern QNAME_RE = Pattern.compile("[^</:>\\s]+:[^</:>=\\s]+");
private static final Pattern START_TAG_RE = Pattern.compile("<[^</>]+>");
private static String addNamespaceDeclIfNeeded(XmlDocument doc, String tags) {
if (doc.getDocument() == null) return tags;
if (doc.getDocument().getDocumentElement() == null) return tags;
Matcher matcher = START_TAG_RE.matcher(tags);
Map<CharSequence, CharSequence> rewriteTable = null;
while (matcher.find()) {
String start_tag = matcher.group();
Matcher matcher2 = QNAME_RE.matcher(start_tag);
while (matcher2.find()) {
String qName = matcher2.group();
NamedNodeMap nodeMap = doc.getDocument().getDocumentElement().getAttributes();
if (isNamespaceDefined(qName, nodeMap)) {
CharSequence namespaceDecl = getNamespaceDecl(getPrefix(qName), nodeMap);
if (namespaceDecl != null) {
if (rewriteTable == null) rewriteTable = new HashMap(8, 1);
StringBuilder str = new StringBuilder(qName.length() + namespaceDecl.length() + 3);
String key = str.append('<').append(qName).append('>').toString();
str.setCharAt(key.length() - 1, ' '); // (last) '>' -> ' '
rewriteTable.put(key, str.append(namespaceDecl).append('>'));
}
}
}
}
if (rewriteTable != null) {
for (Map.Entry<CharSequence, CharSequence> e : rewriteTable.entrySet()) {
tags = tags.replace(e.getKey(), e.getValue());
}
}
return tags;
}
private static CharSequence getNamespaceDecl(final String prefix, NamedNodeMap nodeMap) {
for (int i=0; i < nodeMap.getLength(); i++) {
Attr attr = (Attr) nodeMap.item(i);
if (prefix.equals(attr.getLocalName())) {
return new StringBuilder().
append(attr.getName()).append('=').append('"').append(attr.getValue()).append('"');
}
}
return null;
}
public XmlElement getFragmentContext() {
return fragmentContext;
}
@Override
public void relink_namespace(ThreadContext context) {
relink_namespace(context, getChildren());
}
}
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